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A person is running at 8 m/s in a train moving at 12 m/s in the same direction.

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Question: A person is running at 8 m/s in a train moving at 12 m/s in the same direction. What is the speed of the person relative to the ground?

Options:

  1. 4 m/s
  2. 8 m/s
  3. 12 m/s
  4. 20 m/s

Correct Answer: 20 m/s

Solution: 

Speed of person relative to ground = Speed of train + Speed of person = 12 m/s + 8 m/s = 20 m/s.

A person is running at 8 m/s in a train moving at 12 m/s in the same direction.

Practice Questions

Q1
A person is running at 8 m/s in a train moving at 12 m/s in the same direction. What is the speed of the person relative to the ground?
  1. 4 m/s
  2. 8 m/s
  3. 12 m/s
  4. 20 m/s

Questions & Step-by-Step Solutions

A person is running at 8 m/s in a train moving at 12 m/s in the same direction. What is the speed of the person relative to the ground?
Correct Answer: 20 m/s
  • Step 1: Identify the speed of the train. The train is moving at 12 m/s.
  • Step 2: Identify the speed of the person running inside the train. The person is running at 8 m/s.
  • Step 3: Since both the train and the person are moving in the same direction, you add their speeds together.
  • Step 4: Calculate the total speed: 12 m/s (train) + 8 m/s (person) = 20 m/s.
  • Step 5: The speed of the person relative to the ground is 20 m/s.
  • Relative Velocity – Understanding how to calculate the speed of an object in relation to another moving object.
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